No Market Share movement for WordPress 2.7 yet sorry.
Get a list of 23,607 websites using WordPress 2.7 which includes location information, hosting data, contact details, 7,541 currently live websites
which includes 838 domains that redirect to sites in the list. 16,904 sites that used this technology previously and 2,919 websites in the United States currently using WordPress 2.7.
Distribution of locations of all WordPress 2.7 customers we've ever tracked.